Keyboard



FIG. 1 is a top, front, left perspective view of a keyboard showing my new design;

FIG. 2 is a top, rear, right perspective view thereof;

FIG. 3 is a bottom plan view on a reduced scale; and

FIG. 4 is a right side elevational view on a reduced scale.

The bottom of the keyboard is plain and unornamented. 

The ornamental design for a keyboard, as shown. 